﻿<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="TextBlockStyles.xaml" />
    </ResourceDictionary.MergedDictionaries>

    <ControlTemplate x:Key="ComboBoxToggleButton" TargetType="ToggleButton">
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition />
                <ColumnDefinition Width="20" />
            </Grid.ColumnDefinitions>
            
            <Border x:Name="Border" 
                    Grid.ColumnSpan="2"
                    CornerRadius="0"
                    Background="White"
                    BorderBrush="#D2CFCF"
                    BorderThickness="1" />
            
            <Border Grid.Column="0"
                    CornerRadius="0" 
                    Margin="1" 
                    Background="Transparent" 
                    BorderBrush="#D2CFCF"
                    BorderThickness="0,0,1,0" />
            
            <Path x:Name="Arrow"
                  Grid.Column="1"     
                  Fill="{StaticResource DefaultBackgroundBrush}"
                  HorizontalAlignment="Center"
                  VerticalAlignment="Center"
                  Data="M 0 0 L 4 4 L 8 0 Z"/>
        </Grid>
    </ControlTemplate>

    <Style x:Key="{x:Type ComboBox}" TargetType="ComboBox">
        <Setter Property="SnapsToDevicePixels" Value="true"/>
        <Setter Property="OverridesDefaultStyle" Value="true"/>
        <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
        <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
        <Setter Property="ScrollViewer.CanContentScroll" Value="true"/>
        <Setter Property="MinWidth" Value="50"/>
        <Setter Property="MinHeight" Value="20"/>
        <Setter Property="Foreground" Value="#2D2D2D"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="ComboBox">
                    <Grid>
                        <ToggleButton Name="ToggleButton" 
                                      Template="{StaticResource ComboBoxToggleButton}" 
                                      Grid.Column="2" 
                                      Focusable="false"
                                      IsChecked="{Binding Path=IsDropDownOpen,Mode=TwoWay,RelativeSource={RelativeSource TemplatedParent}}"
                                      ClickMode="Press">
                        </ToggleButton>
                        
                        <ContentPresenter Name="ContentSite"
                                          IsHitTestVisible="False" 
                                          Content="{TemplateBinding SelectionBoxItem}"
                                          ContentTemplate="{TemplateBinding SelectionBoxItemTemplate}"
                                          ContentTemplateSelector="{TemplateBinding ItemTemplateSelector}"
                                          Margin="3,0,23,0"
                                          VerticalAlignment="Center"
                                          HorizontalAlignment="Left" />
                        
                        <TextBox x:Name="PART_EditableTextBox"
                                 HorizontalAlignment="Left" 
                                 VerticalAlignment="Center" 
                                 Margin="3,0,23,0"
                                 Focusable="True" 
                                 Background="Transparent"
                                 Visibility="Hidden"
                                 IsReadOnly="{TemplateBinding IsReadOnly}"
                                 Style="{StaticResource ComboTextBox}"/>
                        
                        <Popup  Name="Popup"
                                Placement="Bottom"
                                IsOpen="{TemplateBinding IsDropDownOpen}"
                                AllowsTransparency="True" 
                                Focusable="False"
                                PopupAnimation="Slide">
                            
                            <Grid Name="DropDown"
                                  SnapsToDevicePixels="True"                
                                  MinWidth="{TemplateBinding ActualWidth}"
                                  MaxHeight="{TemplateBinding MaxDropDownHeight}">
                                
                                <Border x:Name="DropDownBorder"
                                        Background="White"
                                        BorderThickness="1"
                                        BorderBrush="#D2CFCF"
                                        CornerRadius="0"
                                        Opacity="0.9"/>
                                
                                <ScrollViewer Margin="4,6,4,6" SnapsToDevicePixels="True">
                                    <StackPanel IsItemsHost="True" KeyboardNavigation.DirectionalNavigation="Contained" />
                                </ScrollViewer>
                            </Grid>
                        </Popup>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="HasItems" Value="false">
                            <Setter TargetName="DropDownBorder" Property="MinHeight" Value="95"/>
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Foreground" Value="LightGray"/>
                        </Trigger>
                        <Trigger Property="IsGrouping" Value="true">
                            <Setter Property="ScrollViewer.CanContentScroll" Value="false"/>
                        </Trigger>
                        <Trigger SourceName="Popup" Property="Popup.AllowsTransparency" Value="true">
                            <Setter TargetName="DropDownBorder" Property="CornerRadius" Value="4"/>
                            <Setter TargetName="DropDownBorder" Property="Margin" Value="0,2,0,0"/>
                        </Trigger>
                        <Trigger Property="IsEditable" Value="true">
                            <Setter Property="IsTabStop" Value="false"/>
                            <Setter TargetName="PART_EditableTextBox" Property="Visibility"    Value="Visible"/>
                            <Setter TargetName="ContentSite" Property="Visibility" Value="Hidden"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Style.Triggers>
        </Style.Triggers>
    </Style>
</ResourceDictionary>